350-401 · Question #477
A network administrator has designed a network with two multilayer switches on the distribution layer, which act as default gateways for the end hosts. Which two technologies allow every end host in a
The correct answer is A. GLBP C. MHSRP. Explanation GLBP (Gateway Load Balancing Protocol) and MHSRP (Multiple HSRP) are correct because both technologies actively utilize both gateways simultaneously for hosts within a VLAN. GLBP achieves this by assigning different virtual MAC addresses to each gateway, automatically
Question
A network administrator has designed a network with two multilayer switches on the distribution layer, which act as default gateways for the end hosts. Which two technologies allow every end host in a VLAN to use both gateways? (Choose two)
Options
- AGLBP
- BHSRP
- CMHSRP
- DVSS
- EVRRP
How the community answered
(35 responses)- A77% (27)
- B6% (2)
- D3% (1)
- E14% (5)
Explanation
Explanation
GLBP (Gateway Load Balancing Protocol) and MHSRP (Multiple HSRP) are correct because both technologies actively utilize both gateways simultaneously for hosts within a VLAN. GLBP achieves this by assigning different virtual MAC addresses to each gateway, automatically load-balancing traffic across both devices. MHSRP achieves this by running multiple HSRP groups - one group makes Switch A the active gateway for some VLANs while Switch B is active for others, ensuring both switches handle real traffic.
HSRP (B) alone is wrong because a single HSRP group only uses one active gateway at a time, leaving the standby switch idle - it provides redundancy but not load balancing across both devices. VSS (D) is a Cisco Virtual Switching System that logically combines two switches into one, which is a different architecture and doesn't directly address the dual-gateway requirement for end hosts. VRRP (E), like basic HSRP, elects only one master gateway per group, meaning not every host uses both gateways simultaneously.
Memory Tip: Think "Gives Load to Both Paths" for GLBP, and remember MHSRP = Multiple groups = More gateways in use. If the answer involves both gateways being actively used, avoid single-group protocols like HSRP and VRRP.
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